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United States Patent | 6,030,286 |
Kameoka ,   et al. | February 29, 2000 |
In a centrifugal blower in which the outer periphery of an intake opening is arranged outside of the inner edge of a main blade, a large number of sub blades are provided in the intake opening at a location corresponding to the main blade. The sub blades lead the secondary air flowing from an outside area of the intake opening to a rotating direction of a centrifugal multi blade fan. Thus, the secondary air flows from the sub blade to the main blade smoothly, thereby increasing a secondary air flow amount and reducing air flow noise.
Inventors: | Kameoka; Teruhiko (Okazaki, JP); Ito; Koji (Nagoya, JP); Matsunaga; Kouji (Kariya, JP); Kuwayama; Kazutoshi (Nakashima-gun, JP) |
Assignee: | Denso Corporation (Kariya, JP) |
Appl. No.: | 007647 |
Filed: | January 15, 1998 |
Jan 19, 1997[JP] | 9-019011 | |
Apr 10, 1997[JP] | 9-092415 |
Current U.S. Class: | 454/121; 415/119; 415/185; 415/195; 415/208.2 |
Intern'l Class: | B60S 001/54 |
Field of Search: | 415/185,186,195,204,206,208.1,208.2,119 454/121 |
5814908 | Sep., 1998 | Muszynsi | 310/52. |
Foreign Patent Documents | |||
321303 | Oct., 1934 | IT | 415/195. |
57-93700 | Jun., 1982 | JP | 415/119. |